SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images
文献类型：期刊论文
| 作者 | Shu, Yiping1,2; Marques-Chaves, Rui3,4; Evans, N. Wyn2; Perez-Fournon, Ismael3,4 |
| 刊名 | MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY
 |
| 出版日期 | 2018-11-01 |
| 卷号 | 481期号:1页码:L136-L140 |
| 关键词 | gravitational lensing: strong quasars: individual: SDSS J0909+4449 |
| ISSN号 | 0035-8711 |
| DOI | 10.1093/mnrasl/sly174 |
| 通讯作者 | Shu, Yiping(yiping.shu@pmo.ac.cn) |
| 英文摘要 | We report the discovery of SDSS J0909+4449, an exceptional system consisting of a quasar at z = 2.788 strongly lensed by a group of galaxies at z similar to 0.9 into three images separated by up to 14 arcsec based on archival data collected by the Sloan Digital Sky Survey, extended Baryon Oscillation Spectroscopic Survey, Beijing-Arizona Sky Survey, the Mayall z-band Legacy Survey, and the Gemini Telescope. We discuss two hypotheses on the nature of SDSS J0909+4449, i.e. a rare triply imaged quasar in the naked cusp configuration and a typical quadruply imaged quasar with the fourth image undetected in this data. We find that simple lens models can provide excellent fits to the observed image positions and the non-detection under either hypothesis. Deeper imaging data, spectroscopic observations, and follow-up light-curve measurements will be helpful in determining which hypothesis is correct and provide better constraints on the lens mass distribution. Nevertheless, given its unusually large image separations, SDSS J0909+4449 will be a unique probe for the mass structure and the underlying cooling and stellar feedback processes on group or cluster scales. |
| WOS关键词 | GRAVITATIONAL LENSING LIMITS ; DARK-MATTER ; EMISSION ; STELLAR ; MODELS |
| WOS研究方向 | Astronomy & Astrophysics |
| 语种 | 英语 |
| WOS记录号 | WOS:000451569100028 |
| 出版者 | OXFORD UNIV PRESS |
| 源URL | [http://libir.pmo.ac.cn/handle/332002/20731]  |
| 专题 | 中国科学院紫金山天文台 |
| 通讯作者 | Shu, Yiping |
| 作者单位 | 1.Chinese Acad Sci, Purple Mt Observ, 2 West Beijing Rd, Nanjing 210008, Jiangsu, Peoples R China 2.Univ Cambridge, Inst Astron, Madingley Rd, Cambridge CB3 0HA, England 3.Inst Astrofis Canarias, C Via Lactea S-N, E-38205 Tenerife, Spain 4.Univ La Laguna, Dept Astrofis, E-38206 Tenerife, Spain |
| 推荐引用方式 GB/T 7714 | Shu, Yiping,Marques-Chaves, Rui,Evans, N. Wyn,et al. SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images[J]. MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,2018,481(1):L136-L140. |
| APA | Shu, Yiping,Marques-Chaves, Rui,Evans, N. Wyn,&Perez-Fournon, Ismael.(2018).SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images.MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY,481(1),L136-L140. |
| MLA | Shu, Yiping,et al."SDSS J0909+4449: A large-separation strongly lensed quasar at z similar to 2.8 with three images".MONTHLY NOTICES OF THE ROYAL ASTRONOMICAL SOCIETY 481.1(2018):L136-L140. |
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来源：紫金山天文台
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